Free · Browser-side · No sign-up

Convert GLTF to STL Online

Convert GL Transmission Format (glTF) files to STereoLithography (STL), entirely in your browser. No upload, no sign-up. Your files never leave your device.

No sign-up required 100% client-side Up to 100 MB

GLTFSTL

Drop your GLTF files here

Select your .gltf file along with its .mtl and texture files (up to 100 MB)

Try with a sample modelCarCar by Polyforge · CC0 1.0 Universal

Detailed car model with PBR materials in glTF JSON format.

$ 3d print ready

STL is the universal input format for 3D printers and slicing software. Converting from glTF produces a watertight triangle mesh ready for FDM, SLA, and SLS printing workflows.

$ maximum simplicity

STL contains only triangle geometry with no materials, textures, or scene hierarchy. This simplicity ensures compatibility with every slicer, CAD tool, and manufacturing pipeline.

$ cad and engineering use

STL is widely used in engineering, rapid prototyping, and quality inspection workflows. Converting from glTF bridges the gap between visual 3D content and manufacturing applications.

Also convert from GLTF

GLTF → GLB GLTF → OBJ GLTF → FBX GLTF → PLY GLTF → USDZ GLTF → DAE GLTF → 3MF

Other ways to get STL

GLB → STL OBJ → STL FBX → STL PLY → STL USDZ → STL 3DS → STL DAE → STL STP → STL 3MF → STL

── GLTF → STL ──

How to Convert GLTF to STL

Turn your glTF 3D model into a printable STL mesh.

Upload glTF

Drag and drop or select your .gltf file along with its associated .bin and texture files. The converter reads the full scene geometry from all referenced assets.

Processing

Conversion runs entirely in your browser. Scene geometry is merged into a single triangle mesh suitable for 3D printing and CAD applications. Your data never leaves your device.

Download STL

Get your ready to use .stl file. Load it directly into your slicer software, such as Cura, PrusaSlicer, or Bambu Studio, to prepare it for 3D printing.

$ why_convert

Why convert glTF to STL?

glTF 2.0 is the Khronos Group open standard built for real time 3D rendering on the web and in AR applications. It supports PBR materials, skeletal animations, morph targets, and complex multi node scene hierarchies. These features make glTF ideal for interactive visualization, but 3D printing and manufacturing workflows require a fundamentally different kind of file: one that describes raw geometry without any rendering or animation concerns.

STL, created by 3D Systems in 1987 for their stereolithography printers, stores models as an unstructured collection of triangles defined by vertex coordinates and face normals. It carries no color, texture, material, or animation data. This extreme simplicity is precisely what makes STL the universal standard for 3D printing. Every slicer application, from open source tools like Cura and PrusaSlicer to industrial software, accepts STL as its primary input. Converting glTF to STL extracts the geometric surface and outputs a clean triangle mesh ready for slicing, prototyping, or engineering analysis.

Key advantages of STL over glTF

Universal printing format

Every 3D printer slicer on the market accepts STL as its primary input format.

Pure geometry output

Stripping materials and animations produces a clean mesh focused entirely on printable surface data.

Compact binary encoding

Binary STL files are small and fast to transfer between machines on a shop floor.

No software dependencies

STL requires no specific runtime, SDK, or rendering engine to open and process.

CAD tool compatible

Engineering and inspection tools like SolidWorks, Fusion 360, and MeshLab import STL natively.

Decades of stability

The format has remained unchanged since 1987, guaranteeing long term readability across all platforms.